CN101646627A

CN101646627A - Water purification system

Info

Publication number: CN101646627A
Application number: CN200880010527A
Authority: CN
Inventors: M·K·卡达姆; S·M·纳达卡蒂; M·S·滕杜尔卡
Original assignee: Unilever NV
Current assignee: Unilever NV
Priority date: 2007-03-28
Filing date: 2008-02-29
Publication date: 2010-02-10
Anticipated expiration: 2028-02-29
Also published as: ZA200905735B; EP1980538B1; MX2009010178A; UA101314C2; WO2008116724A1; CN101646627B; EA200901307A1; BRPI0809374A2; EP1980538A1; PL1980538T3; EA014726B1

Abstract

The invention relates to a water purification system, a method of purifying water using the system and a method of manufacture of the water purification system. The invention particularly relates to awater purification system for packing small quantities of solid chlorine disinfectant which is stable for long period of time thereby ensuring that sufficient chlorine is available for killing of harmful micro-organisms in water to make it safe for human consumption.Accordingly, the invention provides awater purification system comprising a sachet containing granules of calcium hypochlorite.

Description

Water purification system

Technical field

The present invention relates to water purification system, use the method for this system's purified water and the method for making water purification system.The present invention relates to the water purification system that is used to pack the small amount of solid chlorhexidine-containing disinfectant especially, and described solid chlorhexidine-containing disinfectant is steady in a long-term, thereby guarantees to obtain the harmful microorganism that enough chlorine is used for killing water, drinks to be used safely in the people.

Background technology

Billions of people are arranged, particularly in under-developed country and developing country, especially in the Rural areas, not by the purified water of pipe-line transportation to its dwelling house.The municipal administration water treatment system generally can not be obtained in these areas.People have to be collected in water the Bottle ﹠ Can from the source such as river, well, lake, streams and drilling well and are stored in be used for the cooking in its family and drink purpose.These water infect harmful microorganism usually, such as sporangiocyst, virus and bacterium.In these areas, owing to drink this contaminated water, particularly in baby and child, mortality ratio and morbidity are especially high.People generally know that water boil are made that water is being safe aspect the microorganism, but many people only are heated to water about 60 to 70 ℃, rather than as WHO recommends with water boil 20 minutes.Boiling for a long time of water makes both expensive and needs to obtain fuel such as coal, kerosene or the timber of shortage day by day.Advanced family expenses purification system such as UV (ultraviolet ray), RO (reverse osmosis) etc. require working continuously of power and water, and electricity can not be obtained continuously in these areas.Therefore, need all the time to provide simple, easy-to-use, cheap and safe method with the demand of supplying drinking water for these people.

Be used to kill microorganism in the water traditionally based on the sterilizing agent of halogen.These sterilizing agents comprise iodine, iodine resin, chlorine compound such as Losantin, dichloroisocyanuric acid sodium (NaDCCA), trichloroisocyanuric acid (TCCA) or the like.These sterilizing agents are very effective aspect killing microorganisms, but in them each all has self inherent restriction and problem.The water that derives from source, above-mentioned ground is not only by microbial contamination, and polluted by dissolved impurity such as organic impurity, dissolved salts and the pesticide residue of other pollutent such as suspended dust and soil and trace.Remove these impurity so that obtain to be fit to the water no less important that the mankind drink.In this case, flocculation and disinfectant combination have been recommended before and have used.

WO96/32194 (1996, Truetech) described the water treatment composition of water intermittent type purifying unit dosage form such as tablet form, that can be used to drink purpose, sterilizing agent, condensing agent-precipitation agent, one-level flocculation agent and secondary flocculation agent, dispersion-buffer reagent, coalescent matrix and the pre-filtering agent and body (bulk) ion-exchange that comprise basically as organochlorine compound absorb agent.The inventor finds that the use of organochlorine compound is effectively aspect sterilization, and tablet has high stability aspect available chlorine, even also be like this when being long-term stored under heat and the moist condition.Yet the problem that organochlorine compound runs into is that when this compound was water-soluble, after chlorine was released from this compound, remaining organic compound for example tricyanic acid was deleterious and must be removed from water.This need use scavenging agent such as activated carbon, and it is a trouble for domestic consumer's use.

WO02/00557 (P ﹠amp; G) water purification composition that comprises one-level condensing agent, bridge connection flocculation agent, coagulant aids and optional sterilizing agent has basically been described.The also claimed method that is used for water clarification and purifying of this patent application, this method comprise being selected from condenses and flocculation, sterilization, filtration, neutralization and nitrated several stages.

EP0066421 (Buchan, 1982) describe the composition of the unit dosage form of the water that is used for single stage intermittent type purifying relatively small amount, used the combination of solid inorganic metal-salt with Tricationic, solid, water soluble alkali, solid anionic polymer hydrophilic colloid and optional sterilant.

Although P is ﹠amp; Above two communiques of G and Buchan all relate to the purifying of the water that uses flocculation and sterilization (using the inorganic chlorine based compound), and disclosing wherein relates to the composition that comprises unitary dose, and the mixed and packing of wherein whole mixture is used for human consumer's use.The advantage that disclosed composition is better than by the disclosed composition of Truetech in these two communiques is, inorganic chloride is used as sterilizing agent, it is effectively, and different with organochlorine compound be that the resistates that inorganic chloride has is harmless when being ingested.The research that the inventor also is devoted to this field for a long time, and the problem of facing is that inorganic chloride such as Losantin are very unstable, when particularly having moisture.In single-dose preparations, other composition of composition such as clay etc. have water absorbability and tend to absorb and cause the unsettled moisture of chlorine compound, thus the amount reduction of available chlorine when the human consumer uses said composition.P ﹠amp; The above-mentioned communique of G has been discussed and has been realized best purifying, wherein sterilizing agent preferably with controlled release, the form that postpones to discharge, continue to discharge or slowly discharge uses.Provide the means of this slow releasing pattern to comprise with material blending chlorine compound and poorly water-soluble or hydrophobic or with poorly water-soluble or the hydrophobic material dressing of chlorine compound.The inventor finds that the composition of these types need stir composition and water to be purified so that realize required dissolving and effectiveness for a long time, and is desirable to provide shorter churning time and operates easily to help the human consumer.In addition, in the prior art, need a large amount of purified composition to be used to realize the required quality of purified water.

The inventor is devoted to by persistence to have addressed this problem and developed and guarantees that purified water satisfies the water purification system of the required standard that is used to remove unsafe microorganism.This system relates to and has preliminary election character and be packaged in inorganic chloride in the pouch.For sterilisation purpose, the amount of required chlorine must promptly, be 6-10ppm in than close limit by weight in water.If should amount too low, then in being lower than 5 minutes required time, can not carry out required sterilization.If the amount of being somebody's turn to do is too high, then in processing subsequently, need to use a large amount of quenchers, this may change the taste of water.Therefore, be packaged in and be used for the inorganic chloride that uses by domestic consumer person in the pouch such as the amount of Losantin is about 0.05 to 0.5 gram with about 10-50 premium on currency container.Material, particularly caustic material such as the Losantin of the very difficult amount of will hanging down like this are packaged in the pouch.This situation is used under the situation of mass marketing especially true in described technology, be used for the technology of mass marketing, and billions of this pouches will be manufactured with low-cost, high reliability and high speed.The inventor seeks the packing technique that satisfies this requirement widely, but does not find.When some available techniques can not satisfy the strict demand of accurately weighing, also there was the flowability problem of used chlorine compound in other technology.Therefore the inventor addresses this problem.If the inventor finds that Losantin satisfies some predetermined character, then required low amount might be packaged in the pouch, satisfy the pinpoint accuracy of weighing, the reliability of high-speed packaging is provided, guarantee that simultaneously the storage stability of packaged chlorine compound is not involved.

JP2002136975 (Anto KK) discloses by adding calcium sulfate in Losantin and has measured, handles with the volume that increases Losantin and a spot of tap water is carried out sterilization treatment method.The inventor finds that this technology is not suitable for, because can not satisfy the available chlorine loss storage stability standard of 20% strictness at the most in packaged composition.

Therefore, one object of the present invention provides and can pack 0.05 to the 0.5 a spot of inorganic sterilizing agent that restrains such as the water purification system of Losantin in pouch.

Another object of the present invention provides the water purification system of pouch with the Losantin that comprises 0.05 to 0.5 gram, wherein when 40 ℃ and 85% relative humidity storage in the time of three months available chlorine lose at the most 20%.

Another purpose of the present invention provides in the method that forms and comprise the pouch of 0.05 to 0.5 gram Losantin on the high speed machines with the high reliability of weighing simultaneously under the condition of the storage stability that does not involve Losantin.

Another purpose of the present invention provides water purification system, and this water purification system guarantees that the purifying of former water meets strict WHO and removes standard, uses flocculation-sterilization means, and the removal of bacteria rate is 6log, and viral clearance is that 4log and sporangiocyst clearance are 3log.

Summary of the invention

According to an aspect of the present invention, the water purification system that comprises pouch is provided, pouch comprises the Losantin particle of the water with 55 to 68% available chlorine and the highest 3% of 0.05 to 0.5 gram, and described particulate at least 80% has the granularity between 300 to 850 microns.

According to a preferred aspect of the present invention, the water purification system that comprises the pouch with two compartments is provided, first compartment comprises the Losantin particle of the water with 55 to 68% available chlorine and the highest 3% of 0.05 to 0.5 gram, described particulate at least 80% has the granularity between the 300-850 micron, and second compartment comprises flocculating composition.

The pouch of preferred especially water purification system of the present invention is made by the layered product of polymkeric substance and metal.

According to another aspect of the present invention, provide the method for using water purification system purified water of the present invention, comprised the content of pouch and water blended step to be purified.

According to a further aspect of the invention, provide the method for the pouch of formation and filling water purification system of the present invention, may further comprise the steps:

(a) form pouch by eclipsed longitudinal edge and base sealing with two stacked layered products;

(b) pouch of using the described Losantin grain packing from the cup of pre-determined volume so to obtain; With

(c) with eclipsed top margin heat seal.

Detailed Description Of The Invention

Unless otherwise mentioned, otherwise all herein umbers are meant weight part.

A first aspect of the present invention provides the water purification system that comprises pouch, and the selectivity sterilizing agent that described pouch comprises minute quantity promptly has very optionally Losantin.The inventor finds, in order to satisfy every day needs in about 10 to 50 liters jar or the individual consumer of the tap water in the bucket and the requirement of family thereof, requires to provide the chlorine compound of the minute quantity about 0.05 to 0.5 gram to be used for the sterilization of water.The weight of chlorine compound is different and different according to selected compound, its molecular weight and its available chlorine, but all is in this weight range.

Term " available chlorine " is widely used in the desalt industry.This term is used for possible bleaching or the oxidation or the disinfecting power of comparison chlorine compound at first.This finishes by the chlorine that the method quantitative analysis that is called as iodimetry,iodometry can be used for oxidation.Term " available chlorine " is through being required to discharge the iodine molecule (I of same amount of calculating ₂) chlorine molecule (Cl ₂) weight.Because having only the chlorine molecule of half when in solution is nominal price (+1 oxidation state), the available chlorine content of the chlorine compound of any Cl+ of having (for example HOCl) is the twice of the cationic amount of this existence all the time.

In a word, term " available chlorine " is meant the oxidation capacity of test compound.More information can be referring to " Handbook of chlorine and alternative disinfectants ", the 4th edition, Geo.Clifford White, (John Wiley ﹠amp; Sons Inc.).

Most of chlorhexidine-containing disinfectants are very unstable, particularly have water and air and in as tropic countries under common 30-45 ℃ the high temperature.Losantin is the solid inorganic chlorhexidine-containing disinfectant of using always.It is generally obtained with two kinds of forms.Formula structure than common format is Ca (OCl) Cl and is commonly called stabilization chlorinated lime (SBP).Commercially available chlorinated lime generally has the available chlorine in 30-35 weight % scope.SBP generally obtains with fine powder form and the low water content that is lower than 1 weight %.The Losantin of another kind of form is called as high strength (strength) hypochlorite and its chemical formula is Ca (OCl) ₂It can be acquired at the available chlorine in the 60-65 weight % scope commercial.Commercially available high strength hypochlorite is generally obtained with the water content in 5-10 weight % scope.

When the inventor set about finding to solve the technical scheme of the present problem that the water purification system that can carry out disinfection for the individual consumer and the domestic water thereof of Rural areas is provided, the inventor had realized that sterilizing agent to be packaged will be in the minute quantity that is low to moderate 0.1 gram less than 0.5 gram, usually.The inventor finds that the packing technique of these small quantity of material is not very accurately with reliable, especially for corrosives such as chlorine compound.The inventor attempts to add various filling agents to increase the weight of material to be packaged.The inventor also is devoted to various processing conditionss, film-making are selected and by using the various sterilizing agents that have various character separately to study.The inventor finds to satisfy many conditions, and described product just can satisfy all requirements of human consumer.This product must be packed and make that it is stable, thus the chlorine that can obtain q.s to guarantee sterilization, simultaneously, available chlorine should be too not high, makes shipwreck to drink.After having attempted most of selection, the inventor has run into many problems, such as the tolerance range of weighing, when the filling pouch because the obstruction due to the flow problem of powder/granule and to lack the stripping of poor stability, particle/powder of reliability, packaged chlorine compound slow, and also have many other problems.The inventor finds, when having only the highly selective below Losantin satisfies, just its amount with 0.05 to 0.5 gram might be packaged in the pouch and still satisfy above-described all contrast requirements, described highly selective is that water content is less than 3%, available chlorine is 55 to 68 weight %, and granularity is that feasible particle above 80% has the granularity in the 300-850 micrometer range.If each is not satisfied in these character, then one or more problems can occurs, and can not realize purpose of the present invention.

Preferred Losantin particulate at least 90%, more preferably Losantin particulate at least 95% is in 300 to 850 microns the size range, and described particle has less than 3% water and 55 to 68% available chlorine.Preferred Losantin has in 60 to 68 weight % scopes, the more preferably available chlorine in 60 to 65 weight % scopes.According to water purification system of the present invention, pouch preferably comprises the Losantin particle of 0.1 to 0.25 gram.Especially preferably has chemical formula Ca (OCl) ₂Losantin.It is 2 to 10% calcium oxide that preferred pouch comprises in addition with respect to Losantin particulate weight.Have been found that this composition that comprises calcium oxide provides the stability that further is enhanced.

Wrapping material are at the optimum stabilization that realizes packaged sterilizing agent and other required properties no less important.Wrapping material preferably include the layered product of aluminium lamination and polyethylene layer.Polyethylene layer generally contacts the Losantin particle.Aluminium lamination is positioned on the polyethylene layer outside.Aluminium lamination can be randomly covers with other one or more polymer layers.Suitable polymkeric substance is polyethylene terephthalate (PET).The layer thickness of inboard polyethylene layer is preferably 30 to 100 microns, more preferably 35 to 75 microns.The thickness of aluminium lamination is preferably 5 to 15 microns, more preferably 8 to 12 microns.

In water purification system, the Losantin particle is to exist less than 1 minute dissolved mode when it is stirred in water to be purified.Use water purification system of the present invention, when pouch when 40 ℃ and 85% relative humidity store three months, the minimizing of the available chlorine in described particle is lower than 20%, more preferably less than 10%.

Preferred aspect of the present invention provides water purification system, and wherein pouch comprises two compartments, and first compartment comprises the Losantin particle, and second compartment comprises flocculating composition.When pouch comprised two compartments, the exterior surface area of preferred especially described first compartment was less than the exterior surface area of described second compartment.Using the reason of above-mentioned surface-area relation is that the amount of the surface-area that obtainable permission water enters needs minimum, enters minimum to guarantee water, is used for maximum stable.

The flocculating composition that is present in second compartment preferably comprises condensing agent, and it is the water-soluble salt of trivalent inorganic metal; Flocculation agent, it is a molecular weight water-soluble polymers; And adsorbing clay.

Condensing agent is as the compound with water-soluble inorganic metal-salt of Tricationic.Suitable Tricationic is Al ³⁺And Fe ³⁺Condensing agent is carbon atoms not generally.The example of condensing agent is ferric sulfate, Tai-Ace S 150 and poly aluminium chloride.Be not limited to theory, believe when these condensing agents are in being added into water at pH to form hydroxide compound as a form of gel more than or equal to 6 the time.By forming oxyhydroxide generation agglomerative mechanism as a form of gel the best when pH is adjusted to 6 to 8.5.Throw out as a form of gel is carried the particle and the microorganism of thin suspension secretly when its sedimentation or when condensing.With respect to the weight of flocculating composition, condensing agent is preferably with 5 to 50%, more preferably exist with 15 to 40% amount.

Flocculation agent in flocculating composition of the present invention is the compound as molecular weight water-soluble polymers.The example of flocculation agent is polysaccharide (Sephacel), protein, modified-cellulose (Natvosol/hydroxypropylcellulose or carboxymethyl cellulose) and polyacrylamide, preferred high molecular weight polyacrylamide.Special optimization polypropylene acid amides be anionic or through nonionic modified, more preferably pass through anion-modified.The suitable molecular weight of these polyacrylamides is 10 ⁵To 10 ⁷Scope in.Preferred flocculation agent is Superfloc (deriving from Cytec).With respect to the weight of flocculating composition, the amount of flocculation agent preferably 0.5 to 15% is more preferably 1 to 10%, most preferably is 2 to 8%.

Adsorbing clay in flocculating composition is those clays that can adsorb big water gaging and organic or inorganic compound.The example of clay that can be involved is polynite (dioctahedral smectite clays), hectorite (Laponite), hectorite, nontronite, saponite, Volkonsite, sauconite, beidellite, flag (Allevarlite), illite (lllite), halloysite, attapulgite, mordenite, kaolin and wilkinite.Very preferably clay is a wilkinite according to the present invention.When adsorbing clay was involved, with respect to the weight of flocculating composition, the content of adsorbing clay was 5 to 75%, more preferably about 10 to 60%.

Thereby flocculating composition preferably comprises and can make water be fit to the quencher that the mankind drink with the chlorine reaction.Suitable quencher is Sulfothiorine or xitix.With respect to the weight of flocculating composition, quencher is preferably with 1 to 20%, more preferably exist with about amount of 2 to 12%.

Can be present in another kind of optional ingredients in the flocculating composition and be when flocculating composition dissolved/can keep the buffer reagent of pH in the 6-8.5 scope when being dispersed in the water.Suitable buffer reagent is calcium oxide, yellow soda ash or sodium bicarbonate.When having buffer reagent, it is involved with 0.5 to 10% amount with respect to the weight of flocculating composition.

Flocculating composition preferably restrains, more preferably is present in second compartment of pouch with 1 to 5 amount that restrains with 0.5 to 10.

When pouch was built as two compartments, the method for preferred purified water may further comprise the steps:

(i) content with described first compartment mixes with impure water, then;

The content that (ii) mixes described second compartment is to form throw out therein; With

(iii) from described impure water, separate described throw out, obtain purified water.

The content of first compartment mixed 0.5 to 5 minute usually, and water was left standstill 2-10 minute, added the content of second compartment afterwards.Then mixture was mixed 0.5 to 5 minute, and left standstill once more 2 to 10 minutes.Make the agglutinating matter sedimentation then, from mixture, separate agglutinating matter by filtration or decant usually then.Can use simple cloth to be used for filtering.

Using water purification system of the present invention can purifying be 10 to 50 liters water in batches.Water purification method of the present invention guarantees that the removal of bacteria rate is 6log (embodiment 2-4), and the clearance of virus is that the clearance of 4log (embodiment 5-6) and sporangiocyst is 3log (embodiment 7).

The method of preferred formation and filling pouch may further comprise the steps:

(b) provide the sealing of vertical section of cross-section pouch to form two compartments;

(c) use from first compartment of the described pouch of described Losantin grain packing of the cup of pre-determined volume with second compartment of the described pouch of flocculating composition filling; With

(d) the eclipsed top margin is sealed.

According to a further aspect of the invention, the Losantin particle that is used for being packaged in the amount of 0.05 to 0.5 gram pouch is provided, it has 55 to 68% available chlorine and the highest 3% water, and described particulate at least 80% has the granularity between 300 to 850 microns.

Now further describe the present invention by following non-limiting example.

Embodiment

Embodiment 1 and Comparative examples A-D

Embodiment 1

With chemical formula Ca (OCl) ₂The shown Losantin sample drying with 60% available chlorine is about 2.8% water content extremely.Sample sieved make that about 95% granularity of particle is between 300 to 800 microns.In pouch, make by having as the polyethylene of internal layer with as the layered product of outer field polyethylene terephthalate and the aluminium lamination between this is two-layer by this pouch with sample packaging for use bag filling sealing and packing machine.About 1 hour of machine trouble free operation and get about 10 pouches at random, and measure the Losantin particulate weight in them.The average criterion weight that pouch will be filled with is 0.155 gram.The weight differential data are as shown in table 1.

Comparative examples A

Make pouch according to embodiment 1, difference is that granularity that Losantin has makes the granularity of particulate 90% be in 500 to 2000 microns the scope, the granularity of particulate 70% is in 300 to 800 microns the scope and the granularity of particulate 10% is in 150 to 500 microns scope.The weight differential data of the pouch that 10 this quilts are selected at random are summarised in the table 1.

Table 1

	Embodiment 1	Comparative examples A
	Embodiment 1	Comparative examples A	Weight in average, gram	??0.155	??0.165
Weight range, gram	??0.150-0.158	??0.151-0.180	Weight in average, gram	??0.155	??0.165
Weight range, gram	??0.150-0.158	??0.151-0.180	Standard deviation, gram	??0.003	??0.011

Data presentation has by use the very high control of the amount that is packaged in the Losantin in the pouch and satisfies the Losantin (embodiment 1) that meets character of the present invention and can realize in the table 1, and the not contrast poor (Comparative examples A) within the scope of the present invention the comparative example.

Comparative example B

According to embodiment 1 packing pouch, difference is that the initial moisture content of Losantin is about 5.9%.These pouches are stored in some weeks in heat and the moist chamber (85% relative humidity and 40 ℃).Every a few week draw samples.By stirring in the water that 1 minute content with pouch is dissolved in 10 liters.The available chlorine of measurement in 10 premium on currency.The mean value of twice this measurement is summarised in the table 2.

Embodiment 1

Similarly store research according to 1 pair of prepared sample of embodiment.To be summarised in the table 2 as the data of the available chlorine of the mean value of twice measurement.After storing 3 months under these heat and the wet condition, think that the available chlorine that has above 6ppm is acceptable in water to be purified.

Table 2

The Losantin (comparative example B) that data presentation in the table 2 does not have character of the present invention is unsettled in storing less than 5 weeks, and sample of the present invention (embodiment 1) satisfies required stability criterion.

Comparative example C and D: available chlorine and granularity be within the scope of the present invention Losantin not

Comparative example C: the pouch of sample filling 0.15 gram of the Losantin shown in chemical formula Ca (OCl) Cl of the commercially available water content with about 30% available chlorine and 1% that in bag filling sealing and packing machine, will be used as the stabilization chlorinated lime.The granularity of Losantin is to make the granularity of particulate 90% less than 250 microns.Observed result during packaging is summarised in the table 3.

Comparative Example D: the sample of comparative example C is carried out whole grain, make the granularity of particulate 90% be in 500 to 1500 microns the scope.Use packing that the pouch of this sample is arranged, the observed result when it is dissolved in 10 premium on currency is summarised in the table 3.

Table 3

Comparative example	Observed result
Comparative example	Observed result	C	Filling operation is difficult to carry out.The Losantin particle clings machine parts, and particle flow is poor, can not realize required homogeneity during filling.
D	Even after stirring 5 minutes, in water, can not dissolve fully.	C

Data presentation in the table 3 is difficult to carry out pouch-packaged to having at a small amount of Losantin that is in the character outside the selectivity scope aspect available chlorine % and the granularity.

Embodiment 2-7: the microbiology of system of the present invention is renderd a service

Prepared pouch according to embodiment 1.The preparation have different levels bacterium, poliovirus and sporangiocyst for water on probation and use the pouch content to carry out purifying.Measured the log clearance of various microorganisms.Measuring method of microorganism/surrogate uses at publication " TropicalMedicine and International Health ", the 11st volume, the 9th phase, the 1399-1405 page or leaf, in September, 2006, article title is " Microbiological performance of a watertreatment unit designed for household use in developing countries ", ThomasClasen, the method for describing in detail among Suresh Nadakatti and the Shashikala Menon.

Data are summarised in the table 4.

Table 4

Data presentation in the table 4 is used system of the present invention can obtain to satisfy the bacterium decrement to be 4log and the sporangiocyst decrement water as the high microbiology purity of 3log as 6log, viral decrement.

Embodiment 8 and 9: comprise the influence of calcium oxide:

Embodiment 8:

Prepared the sample that is similar to embodiment 1, the water content when difference is to pack is 2.32%.

Embodiment 9:

Prepared the sample that is similar to embodiment 8, difference is that the calcium oxide that will with respect to Losantin be 5 weight % is included in the pouch.

In embodiment 8 and embodiment 9, target weight is 0.17 gram.Pouch is covered by 12 microns polyethylene terephthalates (PET) by 70 microns polyethylene in the inboard, is covered by 9 microns aluminium, is made by the layered product that 12 microns PET cover.The pouch sample stores several weeks down in HH condition (40 ℃ and 85% humidity).Be dissolved in every several all draw sampless and with the pouch content in 10 liters the water.Measure the available chlorine in 10 premium on currency.Data are summarised in the table 5.

Table 5

Data presentation in the table 5 sample of the present invention (embodiment 8) satisfies the required storage stability standard of available chlorine greater than 6ppm when the HH condition stored for 12 weeks.Comprise calcium oxide the enhanced stability that surpassed for 40 weeks in the storage of HH condition is provided.

Embodiment 10-19:

In bag filling sealing and packing machine, make two compartment pouches.First compartment is filled with the Losantin particle of the present invention of 0.15 gram, and second compartment is filled with the flocculating composition of 1.85 grams, and is as shown in table 6 below.

Table 6

First compartment	Wt, gram
First compartment	Wt, gram	Losantin *	??0.15
Second compartment	Wt, gram	Losantin *	??0.15
Second compartment	Wt, gram	Poly aluminium chloride	??0.40
Polyacrylamide	??0.08	Poly aluminium chloride	??0.40
Polyacrylamide	??0.08	Wilkinite	??1.25
Sodium Thio Sulphate(Anhydrous)	??0.10	Wilkinite	??1.25
Sodium Thio Sulphate(Anhydrous)	??0.10	Calcium oxide	??0.03

* use Losantin particle of the present invention

Use wrapping machine not prepare about 3000 this pouches with shutting down.Select about 10 samples to be used for the water that purifying has about 80-90NTU turbidity at random.The method that is used for purified water is following to be provided:

The method of purified water:

The confession water on probation that has prepared the turbidity of amount shown in containing.The content of first compartment joined in 10 liters the confession water on probation and stirred 1 minute and left standstill 5 minutes.Add the content of second compartment then and stirred 1 minute and left standstill 5 minutes.Be filtered cloth then by coarse cleaning.Before adding the content of second compartment and after filtering, measure the chlorinity of water.Before adding the content of first compartment and after filtration, also measured the turbidity of water.It has been generally acknowledged that the turbidity value less than 1NTU is acceptable.Data are summarised in the table 7.

Table 7

Data presentation in the table 7 is used first compartment with Losantin of having packed minute quantity and two compartment pouches of having packed second compartment of flocculating composition, in high-speed packaging machine, can very consistent mode prepare highly purified water.

Comparative Example E and F: the influence of the type of wrapping material:

Comparative Example E: with the Losantin granule packaging that uses among the embodiment 1 by the inboard as new LDPE (film grade) (LDPE) and the pouch made by the layered product that high density polyethylene(HDPE) (HDPE) layer covers in.

Comparative Example F:

With the Losantin granule packaging that uses among the embodiment 1 by the inboard as polypropylene (PP) and the pouch made by the layered product that high density polyethylene(HDPE) (HDPE) layer covers in.

The pouch of Comparative Example E and Comparative Example F and the pouch that derives from embodiment 1 are stored in the chamber that is maintained at 40 ℃ and 85% humidity.Whether can to satisfy available chlorine be the standard of 6ppm at least to sample for reference when storing after 12 weeks under this condition in particle being dissolved in 10 liters water.The result is summarised in the table 8.

Table 8

Embodiment	Stability
Embodiment	Stability	Embodiment 1 Comparative Example E	Whether
Comparative Example F	Not	Embodiment 1 Comparative Example E	Whether

Therefore the invention provides water purification system, it can be packaged in a spot of Losantin of 0.05 to 0.5 gram in the pouch, and it is stable, thereby guarantees to use it to provide enough available chlorine before taking the purifying tap water the human consumer.The present invention has guaranteed the high reliability of this small weighed.Flocculation-sterilisation system of the present invention can satisfy strict WHO standard: the clearance of bacterium is 6log from impure water, and the clearance of virus is that the clearance of 4log and sporangiocyst is 3log.

Claims

1. the water purification system that comprises pouch, pouch comprise the Losantin particle of the water with 55 to 68% available chlorine and the highest 3% of 0.05 to 0.5 gram, and described particulate at least 80% has the granularity between 300 to 850 microns.

2. it is 2 to 10% calcium oxide that the water purification system of claim 1, wherein said pouch comprise in addition with respect to described Losantin particulate weight.

3. claim 1 and 2 water purification system, wherein said pouch is made by the layered product of polymkeric substance and metal.

4. each water purification system in the aforementioned claim, wherein the minimizing when described pouch available chlorine in described particle when 40 ℃ and 85% relative humidity store three months is lower than 20%.

5. each water purification system in the aforementioned claim, wherein said pouch comprises two compartments, first compartment comprises described particle and second compartment comprises flocculating composition.

6. the water purification system of claim 5, the exterior surface area of wherein said first compartment is less than the exterior surface area of described second compartment.

7. claim 5 or 6 water purification system, wherein said flocculating composition comprises:

(i) condensing agent, it is the water-soluble salt of trivalent inorganic metal;

(ii) flocculation agent, it is a molecular weight water-soluble polymers; With

(iii) adsorbing clay.

8. each water purification system in the claim 5 to 7, wherein said flocculating composition comprises quencher.

9. each water purification system in the claim 5 to 8, wherein said flocculating composition comprises buffer reagent.

10. the water purification system of claim 9, wherein said buffer reagent is yellow soda ash, calcium oxide or sodium bicarbonate.

11. use the method for each water purification system purified water in the claim 1 to 4, comprise with the content of pouch and water blended step to be purified.

12. the method for the purified water of claim 11 wherein is dissolved in the content of pouch in the water to be purified in less than 1 minute.

13. use the method for each water purification system purified water in the aforementioned claim 5 to 10, may further comprise the steps;

(i) content with described first compartment mixes with impure water, then;

(iii) separate described throw out, obtain purified water from described impure water.

14. the method for the purified water of claim 12 or 13, wherein 10 to 50 liters water is purified.

15. it is 6log that the method for each purified water in the aforementioned claim 12 to 14, wherein said method provide the clearance of bacterium, the clearance of virus is that the clearance of 4log and sporangiocyst is 3log.

16. the method for each pouch in formation and the aforementioned claim 1 to 4 of filling said method comprising the steps of:

(b) pouch of using the described Losantin grain packing from the cup of pre-determined volume so to form; With

(c) with eclipsed top margin heat seal.

17. the method for each pouch in formation and the filling claim 5 to 10 said method comprising the steps of:

(d) the eclipsed top margin is sealed.

18. have the application that the Losantin particle of the water of 55 to 68% available chlorine and the highest 3% is used for being packaged in the amount of 0.05 to 0.5 gram pouch, described particulate at least 80% has the granularity between 300 to 850 microns.